ToS header in L2TP frame

I just wondered if anyone could suggest how in an E120 router I could disable the copying of the ToS byte from the IP header into the L2TP header.

BT currently drop broadband traffic that is marked as having ToS bits set to EF or AF11 and our subscribers can mark their packets. If I can leave the L2TP header blank (i.e. ToS = 0) then this solves the issue.

Re: ToS header in L2TP frame

still not sure if we're takling about the same thing here. According to http://tools.ietf.org/html/rfc2661#section-3.1 there is no (besides the single QoS-bit) ToS in the L2TP header. So are you talking about the ToS (in the IP-header):

1. of the inner/subcriber IP-paket (ppp-encaps) or

2. of the outer IP-paket (L2TP-encaps PPP-frame)

I assume with "The L2TP header ToS is copied straight from the IP packet and there is no way of disabling that" you / JTAC refer to 2. This ToS can be modified in an IP-policy.

Please clarify your understanding.

Ulf

If this worked for you please flag my post as an "Accepted Solution" so others can benefit. A kudo would be cool if you think I earned it.